CN117621683A

CN117621683A - Thermal printer core

Info

Publication number: CN117621683A
Application number: CN202210955536.3A
Authority: CN
Inventors: 蒋文柏; 张敏; 张启明; 林枫; 范文飞
Original assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Current assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2024-03-01

Abstract

The utility model provides a thermal printer core, includes bed frame, moves knife tackle spare, stationary knife, beats printer head subassembly, actuating mechanism and rubber roll, and preceding frame can locate on the bed frame with overturning, its characterized in that the bed frame on locate the first piece that resets that can make to move knife tackle spare reset, the inboard of moving knife tackle spare has rack portion, actuating mechanism include driving motor, cam, drive gear group, first duplex gear and slider. The first duplex gear can be rotatably arranged on the cam, the power input end can be meshed with the driving output gear for transmission, and the power output end is meshed with the power input end of the transmission gear set for transmission; the sliding block is arranged on the base frame, and the bottom end of the sliding block can drive the poking part to move. The sliding block is pressed down to drive the cam to rotate, so that the first duplex gear and the second duplex gear are separated, the moving knife assembly automatically returns, the moving knife assembly returns rapidly in the whole process, and the problem of knife clamping failure is thoroughly solved.

Description

Thermal printer core

Technical Field

The present disclosure relates to printing devices, and particularly to a thermal printer core.

Background

The existing thermal printer generally comprises a base frame, a motor, a transmission gear assembly, a printing head assembly and a rubber roller which can be rotationally arranged on the base frame, wherein a power input end of the transmission gear assembly is meshed with a driving output gear of the motor, a power output end of the transmission gear assembly is meshed with a rubber roller gear arranged at the end part of the rubber roller, the rubber roller is used for driving printing paper to move, a paper feeding channel is arranged between the rubber roller and the printing head assembly, the printing head assembly generally comprises a printing head (TPH, thermal Print Head for short), a printing head support, a pressure spring and a pressure spring support frame, the printing head is arranged on the printing head support frame, two ends of the pressure spring support frame are arranged at two ends of the base frame, and two ends of the pressure spring respectively abut against the printing head support frame and the pressure spring support frame, so that the printing head can compress the printing paper on the surface of the rubber roller. When the printing paper is loaded or corrected, the printing paper is generally realized by disassembling the rubber roller, two ends of the rubber roller are generally provided with two bearings, the base frame is provided with a groove for the bearings to be arranged, the groove is semicircular, and the bearings are always positioned in the groove in the working state; when the paper is needed to be fed, the rubber roller communication bearing can be easily separated from the groove. However, the following disadvantages exist: the bearing has larger play amplitude in the groove, and the normal operation of the rubber roller is affected.

The applicant applied for a thermal printer, see Chinese patent publication No. ZL201710535432.6 for thermal printer (issued publication No. CN 107310276B), in which when printing paper is loaded or needs correction treatment, the mounting frame is sprung away from the base frame by slightly pulling the handle, and meanwhile, the first and second swinging parts can instantaneously act on the stationary knife, so that the stationary knife sinks in the vertical direction, the contact positive pressure of the movable knife edge and the stationary knife edge is reduced, the resistance of the movable knife to return is relieved, and the movable knife returns smoothly. However, in the actual use situation, when the cut paper is jammed between the contact surfaces of the movable knife and the fixed knife (generally called as a jam), the sinking abdication of the fixed knife is difficult to reduce the resistance of the jam to the return of the movable knife, and the starting knife cannot be retracted, so that the function is invalid.

Disclosure of Invention

The invention aims to solve the technical problem of providing a thermal printer core with a card paper back moving knife assembly capable of returning rapidly.

The technical scheme adopted for solving the technical problems is as follows: the thermal printer core includes base frame, moving knife assembly, fixed knife, printing head assembly, driving mechanism and rubber roller, the frame can be turned over and set on the base frame, the printing head assembly and fixed knife are set on the frame, the rubber roller can be rotationally set on the base frame, the moving knife assembly is set on the base frame, the driving mechanism is set on the base frame and can drive the moving knife assembly to act, it is characterized by that on the base frame a first reset piece capable of resetting the moving knife assembly is set, the inner side of the moving knife assembly is equipped with rack portion,

the driving mechanism comprises

The power output end of the driving motor is provided with a driving output gear;

the cam is rotatably arranged on one side of the base frame, one end of the cam is connected with a second resetting piece, and the other end of the cam is provided with a poking part;

the transmission gear set is rotatably arranged on one side of the base frame, and the power output end is meshed with the rack part for transmission;

the first duplex gear is rotatably arranged on the cam, the power input end of the first duplex gear can be meshed with the driving output gear for transmission, and the power output end of the first duplex gear is meshed with the power input end of the transmission gear set for transmission; and

the sliding block is arranged on the base frame, and the bottom end of the sliding block can drive the poking part to move.

Further, the two sides of the movable knife component are respectively formed with a rack part, and the transmission gear group comprises

The connecting shaft is rotatably arranged on the base frame;

the first input gear is arranged at one end of the connecting shaft and meshed with the corresponding gear part for transmission;

the second input gear is arranged at the other end of the connecting shaft and meshed with the corresponding gear part for transmission; and

the power output end of the second duplex gear is meshed with the power output end of the first duplex gear for transmission, and the power input end of the second duplex gear is meshed with the first input gear for transmission.

The first restoring element is preferably mounted as follows: the base frame is provided with an auxiliary gear which is meshed with the second input gear for transmission, and the first reset piece is a torsion spring arranged on the auxiliary gear, and the torsion spring can give the auxiliary gear an accumulated potential after rotating.

Preferably, the movable knife assembly comprises a movable knife rest and a movable knife blade arranged on the movable knife rest, and the rack part is formed on the movable knife rest.

Preferably, the second restoring member is a tension spring, one end of which is connected with the base frame, and the other end of which is connected with the cam.

Further, one side of the base frame is provided with a protruding shaft part which is arc-shaped, the cam comprises a body and a protruding part positioned at one side of the body, the body is cylindrical and is provided with an inner cavity, a notch is formed at one side of the inner cavity, the body is rotationally arranged on the shaft part, the protruding part is provided with a shaft pin part for the first duplex gear to rotationally arrange, the poking part is positioned at one side of the body, and the driving output gear is positioned in the inner cavity of the body and is meshed and transmitted with the first duplex gear through the notch.

The upper end face of the base frame is provided with an anti-sticking protection piece close to the rubber roller, and the paper feeding end and the paper discharging end of the base frame are respectively provided with a first rolling protection piece and a second rolling protection piece, and under the state of paper feeding printing, the outer end faces of the first rolling protection piece and the second rolling protection piece can be in rolling contact with the adhesive surface of the bottomless paper label.

When the printer works, the adhesive surface of the bottomless paper label is contacted with the anti-sticking protection piece firstly, so that adhesive can not adhere, normal and long-term printing is ensured, and rolling friction is formed between the adhesive surface of the bottomless paper label and the protection piece due to the arrangement of the first rolling protection piece and the second rolling protection piece, so that abrasion of the anti-sticking protection piece is reduced.

Preferably, the first rolling protection piece comprises a body which can be rotatably arranged on the upper end face of the base frame and an anti-sticking adhesive layer arranged on the outer side of the body.

Preferably, the second rolling protection piece comprises a shaft rod rotatably arranged on the upper end face of the base frame and an anti-sticking rubber sleeve sleeved on the shaft rod.

Preferably, the anti-sticking protection pieces are arranged in a strip shape along the paper feeding direction, and one end of at least one anti-sticking protection piece is arranged adjacent to the rubber roller.

Compared with the prior art, the invention has the advantages that: the sliding block is pressed down to drive the cam to rotate, so that the first duplex gear and the second duplex gear are separated, the moving knife assembly automatically returns, the moving knife assembly returns rapidly in the whole process, and the problem of knife clamping failure is thoroughly solved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment.

Fig. 2 is a schematic diagram of the frame after being turned over in the embodiment.

Fig. 3 is a schematic structural diagram of a base frame part in an embodiment.

Fig. 4 is an enlarged view of the first rolling protector.

Fig. 5 is an enlarged view of the second rolling protector.

Fig. 6 is an exploded view of fig. 5.

Fig. 7 is an enlarged view of a portion of the drive mechanism.

Fig. 8 is a partially exploded view of fig. 7.

Fig. 9 is a combination diagram of a drive mechanism (hidden drive motor) and a moving blade assembly.

Fig. 10 is an enlarged view of the auxiliary gear and the first restoring member of fig. 9.

Fig. 11 is an exploded view of fig. 10.

Fig. 12 is a schematic view of one side of the base frame with the cover and cam removed.

Fig. 13 is an enlarged view of the cam.

Fig. 14 is an enlarged view of another view of the cam.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 and 2, the thermal printer core in this embodiment includes a base frame 1, a frame 3, a moving blade assembly 2, a fixed blade 32, a print head assembly 31, a driving mechanism 4, a rubber roller 11, and a print motor 100, where the frame 3 can be disposed on the base frame 1 in a turnover manner, the print head assembly 31 and the fixed blade 32 are disposed on the frame 3, the rubber roller 11 can be rotatably disposed on the base frame 1, the moving blade assembly 2 is disposed on the base frame 1, the driving mechanism 4 is disposed on the base frame 1 and can drive the moving blade assembly 2 to act, and the print motor 100 can drive the rubber roller 11 to rotate through a transmission gear assembly 101. In this embodiment, cover plates 14 are disposed on two sides of the base frame 1, one side of the cover plate 14 covers the transmission gear assembly 101, and the other side of the cover plate 14 covers the driving mechanism 4.

As shown in fig. 2 and 3, the upper end surface of the base frame 1 is provided with an anti-sticking protection member 12 near the glue roller 11, and the paper feeding end and the paper discharging end of the base frame 1 are respectively provided with a first rolling protection member 6 and a second rolling protection member 7, and in the state of feeding paper and printing, the outer end surfaces of the first rolling protection member 6 and the second rolling protection member 7 can be in rolling contact with the adhesive surface of the bottomless paper label.

Referring to fig. 4, the first rolling protection device 6 in this embodiment includes a main body 61 rotatably disposed on an upper end surface of the base frame 1 and an anti-adhesive layer 62 outside the main body 61.

As shown in fig. 5 and 6, the second rolling protection member 7 includes a rotating shaft 71 rotatably disposed on the upper end surface of the base frame 1, and an anti-sticking rubber sleeve 72 sleeved on the rotating shaft 71.

The anti-sticking protection pieces 12 are arranged in a strip shape along the paper feeding direction, and one ends of the anti-sticking protection pieces 12 are adjacent to the rubber roller 11, so that smooth transition is facilitated.

As shown in fig. 7 and 8, the driving mechanism 4 includes a driving motor 41, a cam 43, a connecting shaft 46, a first input gear 461, a second input gear 462, a first double gear 44, a second double gear 45, and a slider 47. The power output end of the driving motor 41 is provided with a driving output gear 42.

The cam 43 is rotatably arranged at one side of the base frame 1, one end of the cam is connected with a second reset piece 471, and the other end of the cam is provided with a poking part 433; as shown in fig. 12, one side of the base frame 1 is provided with a protruding shaft portion 13, the shaft portion 13 is arc-shaped, and as shown in fig. 13 and 14, the cam 43 in this embodiment includes a body 431 and a protrusion 432 located at one side of the body 431, the body 431 is cylindrical and has an inner cavity, one side of the inner cavity is formed with a notch 435, the body 431 is rotatably disposed on the shaft portion 13, the protrusion 432 is provided with a shaft pin portion 434 for the first duplex gear 44 to be rotatably disposed, the stirring portion 433 is located at one side of the body 431, and the driving output gear 42 is located in the inner cavity of the body 431 and is meshed with the first duplex gear 44 through the notch 435.

The second restoring member 471 in this embodiment is a tension spring having one end connected to the base frame 1 and the other end connected to the protruding portion 436 of the cam 43.

The connecting shaft 46 is rotatably arranged on the base frame 1; the first input gear 461 is arranged at one end of the connecting shaft 46 and meshed with the corresponding gear part for transmission; the second input gear 462 is provided at the other end of the connecting shaft 46 and is engaged with the corresponding gear portion for transmission; the power output end of the second duplex gear 45 is meshed with the power output end of the first duplex gear 44, and the power input end is meshed with the first input gear 461.

The first double gear 44 is rotatably provided on the cam 43 and the power input end is capable of meshing transmission with the drive output gear 42.

The sliding block 47 is arranged on the base frame 1, the bottom end of the sliding block 47 can drive the stirring part 433 to move, and the bottom surface of the sliding block 47 and the top surface of the stirring part 433 adopt inclined surfaces.

As shown in fig. 8, the movable blade assembly 2 includes a movable blade holder 21 and a movable blade 22 provided on the movable blade holder 21, and rack portions 23 are formed on inner walls of both sides of the movable blade holder 21, respectively. A guard 24 is provided outside the movable blade 22.

Referring to fig. 9 to 11, the base 1 in this embodiment is provided with an auxiliary gear 48, the auxiliary gear 48 is meshed with the second input gear 462, and the first restoring member 49 is a torsion spring provided on the auxiliary gear 48, which can impart an accumulated force to the auxiliary gear 48 after rotation, so as to restore the movable cutter assembly.

In normal operation, under the pulling force of the second restoring member 471, the driving cam 43 is at a fixed position, and the first duplex gear 44 and the second duplex gear 45 on the driving cam 43 are always engaged.

When the knife clamping condition occurs, the movable blade is not at the initial position, the frame 3 is turned over, the fixed knife is opened, the sliding block 47 is manually pressed, the sliding block 47 is pressed against the stirring part 433 to drive the cam 43, the cam 43 is driven to rotate clockwise, the first duplex gear 44 is separated from the second duplex gear 45, the first reset piece 49 acts on the auxiliary gear 48, the auxiliary gear 48 rotates and drives the second input gear 462 to drive the rack part 23, and then the movable knife assembly is pulled back to the initial position. The whole process moves the knife tackle spare return rapidly, thoroughly solves the problem that the card sword became invalid.

Claims

1. The utility model provides a thermal printer core, including bed frame (1), frame (3), move knife tackle spare (2), stationary knife (32), print head subassembly (31), actuating mechanism and rubber roll, above-mentioned frame (3) can locate on bed frame (1) with overturning, above-mentioned print head subassembly (31) and stationary knife (32) subassembly are located on frame (3), above-mentioned rubber roll can rotationally locate on bed frame (1), above-mentioned move knife tackle spare (2) are located on bed frame (1), above-mentioned actuating mechanism locates on bed frame (1) and can drive and move knife tackle spare (2) action, characterized in that bed frame (1) on locate first reset piece (49) that can make to move knife tackle spare (2) reset, the inboard of moving knife tackle spare (2) has rack portion (23), actuating mechanism (4) include

A driving motor (41), wherein a power output end is provided with a driving output gear (42);

a cam (43) rotatably arranged at one side of the base frame (1), one end of the cam is connected with a second reset piece (471), and the other end of the cam is formed with a poking part (433);

the transmission gear set is rotatably arranged on one side of the base frame (1), and the power output end is meshed with the rack part (23) for transmission;

a first double gear (44) rotatably provided on the cam (43) and having a power input end engaged with the drive output gear (42), and a power output end engaged with the power input end of the drive gear set; and

and the sliding block (47) is arranged on the base frame (1) and the bottom end of the sliding block can drive the stirring part (433) to move.

2. A thermal printer according to claim 1, wherein the movable blade assembly (2) has rack portions (23) formed on both sides thereof, and the transmission gear set comprises

A connecting shaft (46) rotatably provided on the base frame (1);

a first input gear (461) which is arranged at one end of the connecting shaft (46) and is meshed with the corresponding gear part for transmission;

a second input gear (462) provided at the other end of the connecting shaft (46) and engaged with the corresponding gear portion for transmission; and

and the power output end of the second duplex gear (45) is meshed with the power output end of the first duplex gear (44), and the power input end of the second duplex gear is meshed with the first input gear (461).

3. A thermal printer core according to claim 2, characterized in that said base frame (1) is provided with an auxiliary gear (48), said auxiliary gear (48) being in meshing transmission with said second input gear (462), said first return element (49) being a torsion spring provided on said auxiliary gear (48) and capable of imparting to said auxiliary gear (48) an accumulated potential after rotation.

4. The thermal printer core according to claim 1, wherein the moving blade assembly (2) comprises a moving blade holder (21) and a moving blade (22) disposed on the moving blade holder (21), and the rack portion (23) is formed on the moving blade holder (21).

5. A thermal printer core according to claim 1, characterized in that said second return member (471) is a tension spring, one end of which is connected to the base frame (1) and the other end of which is connected to the cam (43).

6. The thermal printer core according to claim 1, wherein the base frame (1) has a protruding shaft portion (13) at one side, the shaft portion (13) is arc-shaped, the cam (43) comprises a body (431) and a protrusion (432) at one side of the body (431), the body (431) is cylindrical and has an inner cavity, a notch (435) is formed at one side of the inner cavity, the body (431) is rotatably disposed on the shaft portion (13), the protrusion (432) has a shaft pin portion (434) for the first duplex gear (44) to rotate, the stirring portion (433) is disposed at one side of the body (431), and the driving output gear (42) is disposed in the inner cavity of the body (431) and is meshed with the first duplex gear (44) through the notch (435).

7. The thermal printer core according to claim 1, wherein the upper end surface of the base frame (1) is provided with an anti-sticking protection member (12) near the rubber roller (2), and the paper feeding end and the paper discharging end of the base frame (1) are respectively provided with a first rolling protection member (6) and a second rolling protection member (7), and the outer end surfaces of the first rolling protection member (6) and the second rolling protection member (7) can be in rolling contact with the adhesive surface of the bottomless paper label in a state of paper feeding printing.

8. The thermal printer core according to claim 7, wherein the first rolling protection member (6) comprises a body (61) rotatably disposed on the upper end surface of the base frame (1) and an anti-adhesive layer (62) outside the body (61).

9. The thermal printer core according to claim 7, wherein the second rolling protection member (7) comprises a rotating shaft (71) rotatably arranged on the upper end surface of the base frame (1) and an anti-sticking rubber sleeve (72) sleeved on the rotating shaft (71).

10. Thermal printer core suitable for bottomless labels according to claim 7, characterized in that the anti-adhesion protection pieces (12) are arranged in a strip along the feeding direction, one end of at least one of the anti-adhesion protection pieces (12) being arranged adjacent to the glue roller (2).